County ZIP codes · Pennsylvania · FIPS 42001
Adams County, PA ZIP Codes
Adams County, Pennsylvania has 21 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 18 residential and 3 for PO boxes or a single organization. 14 of the residential ones lie mainly in Adams County and 4 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $77,824 in 17324 (Gardners) to $100,150 in 17353 (Orrtanna) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Adams County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $80,000 and $90,030.
They carry 18 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 18 residential ZIP codes in Adams County
14 ZIP codes lie mainly in Adams County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 17325 | Gettysburg | 30,373 | 241 | $81k | $287k | 100% |
| 17350 | New Oxford | 13,169 | 297 | $79k | $237k | 100% |
| 17340 | Littlestown | 11,405 | 290 | $90k | $298k | 100% |
| 17316 | East Berlin | 8,497 | 207 | $91k | $293k | 58% |
| 17320 | Fairfield | 8,124 | 143 | $90k | $295k | 100% |
| 17307 | Biglerville | 5,467 | 92 | $89k | $258k | 91% |
| 17301 | Abbottstown | 4,133 | 348 | $85k | $251k | 61% |
| 17372 | York Springs | 4,045 | 120 | $82k | $283k | 99% |
| 17344 | McSherrystown | 3,719 | 4,979 | $66k | $194k | 100% |
| 17304 | Aspers | 3,171 | 130 | $85k | $248k | 100% |
| 17353 | Orrtanna | 2,825 | 73 | $100k | $264k | 100% |
| 17306 | Bendersville | 537 | 2,201 | $75k | $203k | 100% |
| 17303 | Arendtsville | 395 | 2,297 | $82k | $195k | 100% |
| 17343 | McKnightstown | 31 | 43 | – | – | 100% |
Partly in Adams County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
8 ZIP codes of Adams County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Adams | Elsewhere |
|---|---|---|
| 17331 | 40% | York County60% |
| 17019 | 1% | York County92%; Cumberland County6% |
| 17222 | 31% | Franklin County69% |
| 17316 | 58% | York County42% |
| 17307 | 91% | Cumberland County9% |
| 17324 | 35% | Cumberland County65% |
| 17301 | 61% | York County39% |
| 17372 | 99% | York County1% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 17310 | Cashtown |
| 17337 | Idaville |
| 17375 | Peach Glen |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Adams County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Adams County's ZIP codes use 3 prefixes: 170, 172 and 173.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 170 | Harrisburg, PA (SCF 170) | 1 | 92 |
| 172 | Harrisburg, PA (SCF 170) | 1 | 52 |
| 173 | Harrisburg, PA (SCF 170) | 19 | 58 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.